The signature of the reformer Martin Luther (1483-1546) on a letter adressed to Albrecht von Brandenburg, photographed in Lutherstadt Wittenberg, Germany, 12 May 2017. The letter is part of a national special exhibition "Luther! 95 treasures - 95 people", which can be seen at the Augusteum in Wittenberg. Objects which Luther owned personally, touched or looked at can be seen there. Photo: Peter Endig/dpa-Zentralbild/dpa